﻿<!DOCTYPE html>

<html lang="en" xmlns="http://www.w3.org/1999/xhtml">
<head>
    <meta charset="utf-8" />
    <title></title>
    <style>
        body {
            background: #ccc;
        }
    </style>
    <script>
        function btnClick() {
            cunzai();
        }

        function btn2Click() {
            bucunzai();
        }
    </script>
</head>
<body>
    <input type="button" value="存在" onclick="btnClick()"/>
<input type="button" value="不存在" onclick="btn2Click()"/>
</body>
</html>